Seems to me that when you cut through all the rhetoric in the last gazillion posts, what everyone is talking about are STYLES. With the available cheap storage, even modestly priced arrangers could hold dozens of variations of every conceivable style and not even breath hard. What's the point of eliminating certain genre's when you can have them all without penalty (unless you just can't bear the thought of having a rap or jazz style on your keyboard...there's probably a name for this). I think it's widely accepted that most of today's top arrangers have decent enough sounds for typical arranger use (no one is going to use an arranger in Carniegie Hall). The problem then, is obviously the availability of styles that suit your tastes and needs. Sure they could upgrade the technology (usb 2.0, massive memory, etc., etc.) but none of this is going improve the quality of the styles. All the SA voices in the world aren't going to help if the styles suck. In my opinion, this is the weakest area of arranger development.

chas